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United States Patent | 5,266,540 |
Menicagli ,   et al. | November 30, 1993 |
The regeneration of active carbon onto which one or more organic substances may be adsorbed is achieved by means of a photodegrading process catalyzed by a semiconductor.
Inventors: | Menicagli; Roberto (Mediglia, IT); Miano; Fausto (Enna, IT); Borgarello; Enrico (Turin, IT) |
Assignee: | Eniricerche S.p.A. (Milan, IT) |
Appl. No.: | 034187 |
Filed: | March 22, 1993 |
Feb 01, 1991[IT] | 19241 A/90 |
Current U.S. Class: | 502/5; 210/694; 502/22 |
Intern'l Class: | B01J 020/34; B01J 037/34; B01D 015/04 |
Field of Search: | 502/5,23,22 204/158.21 |
3150105 | Sep., 1964 | Ledding | 502/23. |
3386922 | Jun., 1968 | Rothschild et al. | 502/23. |
3912625 | Oct., 1975 | Case et al. | 210/30. |
4571290 | Feb., 1986 | Ward et al. | 204/157. |
4863608 | Sep., 1989 | Kawai et al. | 210/638. |
4954465 | Sep., 1990 | Kawashima et al. | 502/5. |
Foreign Patent Documents | |||
0325133 | Jul., 1989 | EP. | |
61-200837 | May., 1986 | JP. | |
2021548 | Dec., 1979 | GB. |